// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/nix/mime_util_xdg.h"

#include "base/files/file_path.h"
#include "base/lazy_instance.h"
#include "base/synchronization/lock.h"
#include "base/third_party/xdg_mime/xdgmime.h"
#include "base/threading/thread_restrictions.h"

namespace base {
namespace nix {

    namespace {

        // None of the XDG stuff is thread-safe, so serialize all access under
        // this lock.
        LazyInstance<Lock>::Leaky g_mime_util_xdg_lock = LAZY_INSTANCE_INITIALIZER;

    } // namespace

    std::string GetFileMimeType(const FilePath& filepath)
    {
        if (filepath.empty())
            return std::string();
        ThreadRestrictions::AssertIOAllowed();
        AutoLock scoped_lock(g_mime_util_xdg_lock.Get());
        return xdg_mime_get_mime_type_from_file_name(filepath.value().c_str());
    }

    std::string GetDataMimeType(const std::string& data)
    {
        ThreadRestrictions::AssertIOAllowed();
        AutoLock scoped_lock(g_mime_util_xdg_lock.Get());
        return xdg_mime_get_mime_type_for_data(data.data(), data.length(), NULL);
    }

} // namespace nix
} // namespace base
